> For the complete documentation index, see [llms.txt](https://docs.parallels.com/landing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.parallels.com/landing/pdfm-ug/parallels-desktop-for-mac-27-users-guide/install-or-upgrade-parallels-desktop/upgrading-parallels-desktop.md).

# Upgrading Parallels Desktop

If you already have an older version of Parallels Desktop, follow these steps to upgrade to Parallels Desktop 27.

1. If you haven't already done so, purchase and download a "Parallels Desktop 27 for Mac Upgrade," available from the Parallels Online Store at [https://www.parallels.com](https://www.parallels.com/).

   A Product Activation Key is sent to the email address you provide.
2. If Parallels Desktop is open, quit Parallels Desktop.
3. Follow the instructions to install Parallels Desktop 26. See [**Installing Parallels Desktop**](/landing/pdfm-ug/parallels-desktop-for-mac-27-users-guide/install-or-upgrade-parallels-desktop/installing-parallels-desktop.md).

   During installation, the previous version of Parallels Desktop is automatically removed from your computer.
4. Open Parallels Desktop and enter your upgrade Product Activation Key.

   If you were using a trial version of Parallels Desktop or you purchased a previous version but haven't installed it on your computer, you will also be prompted to enter a full or upgrade key for that version.

### Troubleshooting

If you have any problems upgrading Parallels Desktop, you can find troubleshooting information at <https://www.parallels.com/products/desktop/support/>.


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